Activity coefficients at infinite dilution and physicochemical properties for organic solutes and water in the ionic liquid 1-(2-hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate
Andrzej Marciniak , Michał Wlazło
AbstractThis work presents new data of activity coefficients at infinite dilution, γ∞ of different organic solutes and water in the 1-(2-hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate, [C2OHmim][FAP] ionic liquid. Values of γ∞ were determined for 65 organic solutes, including alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, 1-nitropropane, aldehydes, acetonitrile and water by inverse gas chromatography within the temperature range from (318.15 to 368.15) K. The basic thermodynamic functions, such as partial molar excess Gibbs energies, View the MathML source, enthalpies, View the MathML source and entropies, View the MathML source at infinite dilution were calculated from the experimental γ∞ values obtained over the temperature range. Additionally the gas–liquid partition coefficients, KL were determined. Experimental values of gas–liquid partition coefficients were used to determine the coefficients in the Abraham solvation parameter model (LFER). Results are compared to previously investigated ionic liquids with the same [C2OHmim]+ cation and [FAP]− anion. The selectivity and capacity at infinite dilution for alkanes/thiophene extraction problems were calculated from experimental γ∞ values to verify the possibility of investigated ionic liquid as an entrainer in liquid–liquid extraction.
|Journal series||Journal of Chemical Thermodynamics, ISSN 0021-9614|
|Publication size in sheets||0.5|
|Keywords in English||Activity coefficient at infinite dilution; Ionic liquid; 1-(2-Hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate; [C2OHmim][FAP]; Selectivity; Thiophene extraction; LFER|
|ASJC Classification||; ;|
|Score|| = 30.0, 01-02-2020, ArticleFromJournal|
= 35.0, 01-02-2020, ArticleFromJournal
|Publication indicators||= 24; = 25; : 2013 = 1.234; : 2013 = 2.423 (2) - 2013=2.399 (5)|
|Citation count*||18 (2020-09-10)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.